Repeated update: OS X Update 10.10.1

I wonder if anybody knows why this issue is occurring:

This OS update was released, I think, mid-November, which is when I first installed it. However every day my system tells me I need to install the update. So, in my Updates list in the past 30 days I have 6 Updates installed, half of which are:

but with varying Installed dates of course.

How do I stop this unending cycle?